How would you measure out a 1/4 mile stretch of road and time myself? - BMW M5 Forum and M6 Forums
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post #1 of 5 Old 10th September 2001, 04:58 PM Thread Starter
Adam
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Question How would you measure out a 1/4 mile stretch of road and time myself?

Hiya all

My pa and I have found a brilliant piece of road near to where i live it is never used and has a 800m-900m straight.....incase any of you guys are worrying i can see a further 500m as the road curls up a hill...this is one heck of a road!!

I really want to see what we can do with the beast and as i have no access to high tech measuring equipment(one on the wish list) I was wondering if anyone had a good way of measuring out a 1/4 mile semi accurateley and quickly as well as timing we would have a stopwatch.

Thank you for any ideas its just i have a couple of rough ideas in my head but I would prefer to hears some other peoples ideas
All the best

Adam
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post #2 of 5 Old 10th September 2001, 05:53 PM
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post #3 of 5 Old 10th September 2001, 06:30 PM
Bart Carter
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G-Tech

I second the G-Tech. I talked to the original creator and decided to get one myself.

As in all devices of this type, how you measure and interpret is important. When the speed in a quarter mile is measured, they keep measuring after you actually pass the quarter mile mark and take an average of the before/after.

Things like this make it impossible to exactly duplicate results, but you are so close it really doesn't matter.

Just one thing, be sure you mount it according to instructions for the most accurate results.

-Bart
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post #4 of 5 Old 10th September 2001, 06:32 PM
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Re: G-Tech

I hope that came across as when the measure you at an actual quarter mile race track.....

-Bart
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post #5 of 5 Old 10th September 2001, 06:51 PM
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If you've got that kind of "private" road and can hang around without being bothered, I'd bite the bullet and get a Stalker ATS radar gun with the STATS computer interface. Set it up on a tripod and have at it. G-Tech's are good for approximate stuff, but many second order factors get into the mix with these things. The Stalker is accurate to .1 MPH and .01 second. The software that you put on your laptop lets you graph all sorts of things. It really is a class piece of equipment. I use mine for all sorts of things; snowmobiles, baseball pitching, high performance boats, PWC's, bikes and cars. I call it my "Bullshit Eradicator". I've tracked an air rifle pellet at 257 MPH with it.

Like the G-Tech, you don't have to mark out a 1/4 mile with it. It determines the distance itself. You just get in the car, boot it, and let off when you're going faster than what you know the car will do that distance, say 115 MPH in the M5.

You can check it out at:

www.radarsales.com

So the downside is that you'll spend $2,500 for it (way up the price/ performance curve), but it's a hell of a tool. Accurate as hell, and repeatable. They should include one with the purchace of every M5!

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